Henry mantey



(No Model.)

Y H. MANTEY.

EDGE RUNNER OB. VERTICAL MILLSTONE.

Patented Dec. 13, 1892...

z Nonvys Pneus co, Pr-crmumo UNITED STATES PATENT OFFICE.

HENRY MANTEY, OF MAGDEBURG, GERMANY, ASSIGNOR TO THE GRUSON- WERK, OF SAME PLACE.

EDGE-RUNNER OR VERTICAL MILLSTONE.

SPECIFICATION forming part of Letters Patent No. 488,146, dated December 13, 1892.

Application filed January 6,1892. Serial No. 417,196. (No model.) Patented in Belgium February 12, 1890, No. 89,496; in France February 12, 1890, No. 203,738; in Mexico August 7, 1890, and in Germany December 24, 1890, No. 58,110.

To a/ZZ wiz/0m it may concern,.-

Be it known that l, HENRY MANTEY, a citizen of the United States, and at present residing at Magdeburg-Buckau, in the Kingdom of Prussia and German Empire, have i11- vented certain new and useful Improvements in Edge-Runners or Vertical Millstones, (for which I have obtained Letters Patent in Belgium, No. 89,496, dated February 12', 1890; in Mexico, dated August 7, 1890; in Germany, No. 58,110, dated December 24, 1890, and in France, No. 203,738, dated February 12,1890,) of which the following specification, taken in connection with the accompanying drawings, is a full, clear, and exact description, such as will enable those skilled in the art to make and use the same.

The invention relates to improvements in that class of millstones which have two or more vertical millstones arranged on horizontal axles and adapted to rotate around a common central shaft through which the power is applied for rotating them; and it consists in arranging the axles upon which the millstones are mounted in the same horizout-a1 plane of rotation, but in different vertical planes, which are forwardly inclined with relation to the radius of revolution. The object of this new arrangement of axles is to counteract the tendency of the millstones to press outward upon their bearings under the iniiuence of the centrifugal force, and there by to obtain a decrease of the wear of the axles and of their bearings.

In order that my invention may be fully understood, I will first describe the same with reference to the accompanying drawings, and then more particularly point out in the claims what I deem as new therein.

The drawings represent three of the preferred forms of the invention.

In said drawings, Figure 1 is a sectional View, partly in' elevation, of the preferred form of my invention, taken on K+he line 1 l of Figs. 2 and 3, in which the millstones are mounted upon adjustable crank axles extending from the vertical operating-shaft. Fig. 2 is an end elevation of the same, also showing the plan in section. Fig. 3 isa top sectional view of the same, taken on the lines 3 3 of Figs. l and 2. Fig. 4 is a top View, partly in section, of a modification in which the millstones are mounted upon separate axles secured together by a centrally-arranged casting, which is secured to the vertical operating-shaft. Fig. 5 is a similar view of another form of my invention, in which both of the millstones are mounted upon a single axle, the bearings of the opposite ends extending in dierent vertical planes, and the axle being provided at its center with a casting, by means of which it is attached to the vertical operating-shaft.

Referring more particularly to the several figures, I will describe the same more specifically.

In Figs. l, 2, and 3, A A are the vertical millstones, B B are the crank-axles, upon which said millstones are journaled, and C is a cross-beam mounted at its center upon the vertical operating-shaft D and having mounted in its opposite ends the crank-axles B B. The beam C is provided at its opposite ends with journal-boxes E E, and thejournal ends b of the crank-axles B are journaled in said boxes E and held therein by means of linchpins b. The millstones A A are secured on the journal ends b2 of the crank-axles B B by means of the linchpins b3.

F is the basin, built upon the foundation F and formed with a central step F2, in which the lower end of the shaft D is journaled, and an annular depression F3, in which the bedstone G is mounted. The millstones A A rest on the bed-stone G, and as they travel around with the operating-shaft D they grind the material in the basin in the manner Well understood.

H is a beveled cog-gear keyed to the upper end of the operating-shaft, and K is a powershaft carrying a bevel-gear L, gearing with the cog-gear H, by means of which motion is imparted to said operating-shaft and the trailing millstones. It is obvious that with this construction the millstones will rise and fall fautomatically to suit the varying conditions of the` ore, grain, or other substance being ground, and at the same time they will not be subjected to the severe action of the centrifugal force which is usually present in such machines, because the axle ends upon which the stones are journaled are forwardly inclined with relation to the radius of revolution and the friction on the working faces ot' the wheels ,is in a direction at right angles to the radius, which obviously gives them an inward tendency on their axles in counteraction of the centrifugal force.

In Fig. 4 I have shown a somewhat-simpler modification of my invention. AA are the millstones journaled upon the axles M M, which axles are arranged in the same horizontal plane of rotation, but in different vertical planes, whieh are forwardly inclined with relation to the radius of revolution. These axles are joined together by means of acasting N, which is provided at its opposite ends with sockets n n for the inner ends of said axles M to fit into, said axles being secured therein by means of pins m m, which pass through said casting and axles. The casting is secured at its center to the operating-shaft in any preferred manner and operated as in the preferred form.

In Fig. 5 I have shown a still furthermodification. A A are the millstones, and O is the axle, which is provided at its opposite ends with bearings for said millstones and at its centerwith a diagonally-running portion o, upon which is mounted a casting P.

ring P is keyedto the central operating-shaft in any desired manner. The opposite ends of the axle O are in the same horizontal plane of rotation, but in different vertical planes, for the same purpose as in the other forms of the invention.

It will be observed that in each form of my invention the axles upon which the stones are supported are in the same horizontal plane of rotation, butin different vertical planes,which vertical planes do not pass through the central operatingshaft, but are forwardly inclined with relation to the radius of rotation.

This arrangement of the axles gives the stones an inward tendency and counteracts the centrifugal force, so that the bad effect therefrom is reduced to a minimum and the stones and bearings will last a much longer time.

The action of my improved mill may be explained as follows: The resistance on the working faces of all cylindrical vertical millstones is exerted in a direction parallel with the tangent of the circle of revolution, and the stones tend to move in the same direction.

In the common form of vertical mills the axles y upon which the stones are mounted extend radially from the vertical operati ng-sh aft, and

The cast-- consequently the resistance on the working faces of the stones is exerted at right `angles to their axles, and the tangential tendency of the stones, which moves them outwardly on their axles, is not counteracted. Therefore with this form of mili the centrifugal force resulting from the rapid revolution of the millstones is materially aided by the friction on the working faces of the stones and tends to throw the stones outwardly on their bearings and causes a great deal of wear. In my improved form of mill, however, the supporting-axles do not extend radially from the vertical operating-shaft, but are supported therefrom by a suitable boxing in such relation that they will be inclined to the radius and tangent of the circle of revolution, so that the resistance of the working faces of the stones (which is always in a direction parallel to the said tangent) will give them an inward tendency on their axles and counteract their outward tendency from the centrifugal force.

I am aware thatit is not new to arrange axles for millstones with the opposite ends upon which the millstones are journaled extending in different horizontal planes; but this arrangement necessitates the use of a basin or bed-stone in the form of steps, which does not avoid in asufticient measure the resulting inconveniences; but I am not aware that it has ever been proposed to arrange millstones in the manner hereinbefore set forth, and particularly defined in the claims.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. The combination of the vertical millstones, the axle or axles upon which said millstones are journaled, and means for revolving said millstones around a common center, said axle or axles extending horizontally from the center of rotation and inclining forward with relation to the radius of revolution, substantially as set forth.

2. The combination of a vertical drivingshaft, a cross-beam secured to said shaft and IOC having bearings on its opposite ends, andA crank-axles supported in said bearings at their inner journal ends and having outer journal ends upon which vertical millstones are supported, said outer journal ends being inclined forward with relation tothe radius of revolution, substantially as set forth.

HENRY MANTEY. viitnessesv HERMANN LUBoUsKI, EMIL KALLNEOKER. 

